Effects of Diesel Pre-Injection Time on Combustion Process and Emission Characteristics of Diesel/Methanol Dual Fuel Engine DOI

Mingrui Wei,

Guangzhao Guo,

Jinping Liu

et al.

Combustion Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Oct. 9, 2024

The traditional diesel engine not only causes the reduction of nonrenewable energy but also aggravates environmental pollution. utilization renewable fuels in can effectively reduce dependence on oil sources emissions. As a oxygen-containing fuel with low production cost and widely sourced, methanol holds vast potential for application engine. dual-fuel combustion has emerged as an important research issue internal industry. This paper conducted study emission characteristics diesel/methanol dual based optical test platform 3D numerical simulation software. results show that change cylinder pressure is relatively small heat release rate increases advance pre-injection time. time mainly affects mixture distribution diesel, more evenly mixed degree premixed becomes higher, will lead to rapid combustion, so peak shows increasing trend. advanced, resulting leaner early stage, easy burn, CA10 CA50 are delayed. soot formation decreases uniform, number pixels KL factor each range decreases. average temperature reduced NOX decreasing trend CO generation

Language: Английский

The Mechanism of the Increased Ratio of Nitrogen Dioxide to Nitrogen Oxides in Methanol/Diesel Dual Fuel Engines DOI
Ruomiao Yang,

Tansu Shang,

Lingmin Li

et al.

Energy, Journal Year: 2024, Volume and Issue: 312, P. 133701 - 133701

Published: Nov. 2, 2024

Language: Английский

Citations

19
Effects of methanol energy substitution ratio and diesel injection timing on a methanol/diesel dual-fuel direct injection engine DOI

Xiaojun Yin,

Yan Yu,

Xianfeng Ren

et al.

Fuel, Journal Year: 2024, Volume and Issue: 382, P. 133773 - 133773

Published: Nov. 21, 2024

Language: Английский

Citations

5
Exploration and optimization of injection strategy for medium-speed diesel/methanol dual direct-injection marine engine under extremely high methanol energy ratio DOI
Yue Yu, Huabing Wen,

Jianhua Shen

et al.

Energy Sources Part A Recovery Utilization and Environmental Effects, Journal Year: 2025, Volume and Issue: 47(1), P. 1289 - 1307

Published: Jan. 3, 2025

Methanol is considered as one of the most promising efficient and clean alternative fuels for marine engines. However, increased methanol energy ratio (MER) by direct injection can easily cause extended ignition delay thereby misfiring. To maximize MER achieve stable combustion medium-speed diesel/methanol dual direct-injection engines under extremely high MER, a 3D computational fluid dynamics (CFD) model engine established using CONVERGE/3.0 code. The suitable fuel injector configurations are explored, strategy optimized an 96.5% based on CFD model. findings demonstrate that mixing rate diesel jets enhanced symmetric injectors compared to asymmetric their effects mechanism spray development. indicated thermal efficiency (ITE) from 45.5% 48.3% through advancing timing 0°CA BTDC 25°CA BTDC. Additionally, optimal strategies characterizing highest ITE 48.3%, lower global emissions, among cases yielded with duration 40°CA pressure 56 MPa; 26.4 MPa condition, improved 15.9%.

Language: Английский

Citations

0
Study on a Self-Driven Mineral Carbonation Path in Solid Waste DOI

Q.Q. Lei,

Hao Lü,

Huachen Liu

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: March 8, 2025

Language: Английский

Citations

0
Effect of Auxiliary Hydrogen Injection in the Prechamber on the Combustion Process of a Natural Gas Engine DOI Creative Commons
Xue Yang, Guanguan Li, Yongliang Liang

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Prechamber jet ignition, as an efficient ignition technology, can enhance stability and enable rapid combustion. The mixture formation flow dynamics inside the prechamber are very important for process engine performance. Active is effective method to achieve turbulent but at present there currently limited understanding of impact auxiliary fuel injection (AFI) in active prechamber. In this study, it suggested use hydrogen improve prechamber, thereby improving performance jet. influences AFI on combustion studied by numerical simulation. Under different strategies, in-cylinder flow, processes simulated. effect schemes combustion, characteristics, main chamber, radicals, compared. results show that operating natural gas under lean burn conditions increases indicated thermal efficiency lowers NOx emissions. introduction shortens time interval between spark timing hot jet, advancing chamber. As amount injected rises, velocity temperature increase, so strengthened. Moreover, flows into chamber chemical activity there. combination with significantly improves accelerates rate showing potential expand limit engines.

Language: Английский

Citations

0
Overview for methanol and formaldehyde unregulated emissions of methanol fueled engines DOI
Wei Hong, Ziye Zhang, Xinru Zhang

et al.

Journal of the Energy Institute, Journal Year: 2025, Volume and Issue: unknown, P. 102089 - 102089

Published: April 1, 2025

Language: Английский

Citations

0
Visualization study on the effects of water addition on microscopic and macroscopic spray characteristics of methanol with high-pressure direct injection DOI
Qianming Wang,

Wuqiang Long,

Wei Sang

et al.

Fuel, Journal Year: 2025, Volume and Issue: 396, P. 135361 - 135361

Published: April 15, 2025

Language: Английский

Citations

0
Combustion and Emission Characteristics of Methanol–Diesel Dual Fuel Engine at Different Altitudes DOI Creative Commons
Zhongcheng Wang,

Jie Zhu,

Xiaoyu Liu

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(12), P. 2210 - 2210

Published: Dec. 2, 2024

Currently, in the two technological approaches for using diesel pilot injection to ignite methanol and partially substituting fuel with methanol, neither can fully achieve carbon neutrality context of internal combustion engines. Compression-ignition direct-injection marine engines exhibit significant application potential because their superior economy lower emissions. However, low cetane number coupled its high ignition temperature latent heat vaporization, poses challenges, especially amidst increasingly stringent emission regulations. It is imperative comprehensively explore impacts engine geometry, intake boundary conditions, strategies on performance. This paper first investigates influence compression ratio performance, subsequently analyzes effects conditions characteristics, finally compares characteristics under different timings. When set at 13.5, only an timing −30 °CA initiate ignition, but not ideal. For ratios 15.5 17.5, all timings studied methanol. Reasonable increases pressure are beneficial ignition. when rises from 400 K 500 K, a decrease thermal efficiency observed. Particularly, °CA, both peak cylinder higher, occurs earlier, process shifts forward, indicated higher levels. Furthermore, overall emissions NOX, HC, CO relatively low. Therefore, selecting appropriate crucial facilitate low-load conditions.

Language: Английский

Citations

1
Effects of Diesel Pre-Injection Time on Combustion Process and Emission Characteristics of Diesel/Methanol Dual Fuel Engine DOI

Mingrui Wei,

Guangzhao Guo,

Jinping Liu

et al.

Combustion Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Oct. 9, 2024

The traditional diesel engine not only causes the reduction of nonrenewable energy but also aggravates environmental pollution. utilization renewable fuels in can effectively reduce dependence on oil sources emissions. As a oxygen-containing fuel with low production cost and widely sourced, methanol holds vast potential for application engine. dual-fuel combustion has emerged as an important research issue internal industry. This paper conducted study emission characteristics diesel/methanol dual based optical test platform 3D numerical simulation software. results show that change cylinder pressure is relatively small heat release rate increases advance pre-injection time. time mainly affects mixture distribution diesel, more evenly mixed degree premixed becomes higher, will lead to rapid combustion, so peak shows increasing trend. advanced, resulting leaner early stage, easy burn, CA10 CA50 are delayed. soot formation decreases uniform, number pixels KL factor each range decreases. average temperature reduced NOX decreasing trend CO generation

Language: Английский

Citations

0